Hi All, Really interesting Ian. Years ago we installed one of those flashing light cyl hd rate of change sensors on our Pawnee and it has been worth every cent it cost. Basically we havnt had any cracked pots since it was installed. (16 years now)
When I did our Dimona, … and taking Nigel’s advice I installed a Westach dual CHT with the sensors on the 2 rear cylinders. It has been brilliant so have done the same with the other 2 Grob 109’s and just recently one for a Stemme S10 with the 2.4 Limbach. I guess the only thing to watch is to make sure the cold junction is in a cool area (like the cockpit) and not in the engine compartment. It can be a bit tricky using the 14mm plug rings ie not to scrunch them when tightening the plugs. I have been using white heat sink compound on the plug threads and always a torque wrench. (the heat sink stuff is available from RS Components … part no 554-311). Also have installed an MGL FF-3 2.5 inch fuel flow unit with the turbine sender. It is really great as the VDO sender can still be used for fuel level but can be calibrated over 5 points so can overcome the non linear tank level problem. Also if the electric pump is on the fuel flow indication goes really high because of the pumps pulses and the proximity of the turbine sensor to it .. but reads correct when just the mechanical pump is going so is a good way to check the electric pumps operation. All good over here in New Zealand and it would be great to see anybody associated with H36’s over here (free accommodation available) GCB has about 160 hrs now. The L2000 is running really well. Havn’t had to adjust the tappets now for over 100 hrs. Ian Williams From: [email protected] [mailto:[email protected]] On Behalf Of Ian Mc Phee Sent: Monday, 4 April 2016 2:00 p.m. To: DOG LIST Subject: Re: [DOG mailing list] CHT Gauge Totally & completely agree with good CHT and infact I have been using KSA CHT1DT which gives it digital on 2 cylinders has over temp light which I set for 175°c & have used in motor gliders for 7 years now. It also has shock cooling & I set for 20°c/min (factory data in USA says max 40f/min) They were $400 but Bill Simkinson now mid 70s has retired regretfully in SF Bay area. I have sold about 30 of these to most clubs for Pawnees etc up and down the east coast of Australia. Regretfully I need to look for something new but been talking to Ian Bent & said consider it an insurance policy one off payment on engine. With our h36 I discovered there was air flow from left to right side of engine thus I added a division down middle of engine to make air going in LHS work harder. The DA 20 single engined Diamond has Lycoming and has much bigger hole on upwards going blade to downward going blade. In the early days of towing with C180 s 2 years later there were cracked cylinders everywhere. Remember VH-WIT had 4or 5 cracked cylinders. Bob how has your C180 going? Currently am thinking EI ultimate scanner or JPI (too expensive I think) or one made in Czech Republic and another I saw in bear hog at weekend MGS. Anybody got suggestions? Ian McPhee 0428847642 Box 657 Byron Bay NSW 2481
